CN103780420A - Automatic configuration method and system of Ethernet connectivity detection in VPLS environment - Google Patents

Automatic configuration method and system of Ethernet connectivity detection in VPLS environment Download PDF

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CN103780420A
CN103780420A CN201210410567.7A CN201210410567A CN103780420A CN 103780420 A CN103780420 A CN 103780420A CN 201210410567 A CN201210410567 A CN 201210410567A CN 103780420 A CN103780420 A CN 103780420A
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mep
eth
bgp
vpls
ethernet
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CN103780420B (en
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何晓明
刘志华
刘春晖
贾曼
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Abstract

The invention brings forward an automatic configuration method and a system of Ethernet connectivity detection in a VPLS environment. A VPLS example is configured on a PE. OAM information of the Ethernet connectivity detection is configured on the PE. When the PE receives MP-BGP updating message, the MP-BGP updating message comprises a BGP expansion group attribute carrying the Ethernet OAM information. The Ethernet OAM information carried by the BGP expansion group attribute in the received MP-BGP updating message is matched with the self-configured Ethernet OAM information by the PE. If the matching result is yes, an equivalent MEPID list is automatically generated and used for matching MEP ID information of the PE carried in an ETH-CC message sent by each opposite-end PE of the same VPLS example. Ethernet OAM configuration management work can be effectively reduced so that network operation and maintenance efficiency is enhanced.

Description

The method of automatic configuration of Ethernet detection of connectivity and system under VPLS environment
Technical field
The present invention relates to communication technical field, relate in particular to VPLS(Virtual Private Local Area Network Service, virtual special local area network service) method of automatic configuration and the system of Ethernet detection of connectivity under environment.
Background technology
VPLS utilizes public IP(Internet Protocol, Internet protocol)/MPLS(Multi-Protocol Label Switching, multiprotocol label switching) basic network facility builds a kind of method of local area network (LAN), and it provides a kind of how point-to-multipoint Ethernet service of crossing over metropolitan area network or wide area network.VPLS requires all provider edge equipments (PE) that add same VPLS example to realize connection entirely, and client's ethernet frame is encapsulated and forwarded by the transparent transmission tunnel of this VPLS example.
Have at present 2 kinds of realizations to belong to the full method connecting of PE equipment of same VPLS example:
The first, manual configuration
Manual configuration needs each peer-to-peer of the manual PE of appointment.Owing to needing to set up full connection between each PE in same VPLS example, fashionable whenever there being new PE to add, on all relevant PE, all to revise configuration, cause extensibility poor.
Manual configuration method is suitable for network and userbase is less, user site is few and the relatively-stationary scene of site location.The situation large at network and userbase, user site often changes, manual configuration method will be brought a large amount of Operation and Maintenance and management work.
The second, automatically find
Auto discovery mechanism finds to belong to the PE member of same VPLS example automatically by signaling protocol, in VPLS example, the configuration of PE is not subject to the impact that other PE increase or delete, thereby there is good autgmentability, can realize the dynamic change of network topology and user site, the workload of greatly simplifying configuration, is relatively adapted at disposing in carrier network.
Ethernet, as network interconnection technology with the fastest developing speed, not only becomes prevailing local area network technology, and is applied to metropolitan area network and wide area network as access and transmission technology more and more.Along with the operation of Ethernet, administer and maintain the issue of (OAM) standard, Ethernet OAM technology is ripe, increasing Carrier Ethernet equipment has started commercialization.Also Carrier Ethernet required more configuration and management work have been brought thus.
Dispose VPLS service in large-scale carrier network time, need a set of strong network operation and maintenance service, to facilitate, network performance and fault are monitored, in time discovering network defect, get around malfunctioning node or link, promote availability and the user awareness of network.Therefore, under VPLS environment, dispose Ethernet OAM and become a kind of inevitable choice.
Ethernet detection of connectivity (ETH-CC) function is one of most important functions of Ethernet OAM, and ETH-CC can switch application for fault management, performance monitoring or protection.Each supports the maintenance entity end points (MEP) of ETH-CC to need following specific configuration information:
1) MEG rank: in the situation that Maintenance Entity (MEG) is nested, for distinguishing the regulatory boundary of each MEG;
2) MEG ID: the identifier that represents the affiliated MEG of MEP;
3) MEP ID: the identifier of the MEP in MEG itself;
4) reciprocity MEP ID list: the list of the reciprocity MEP in this MEG.To comprising the point-to-point MEG of single maintenance entity (ME), the id information that this list comprises single reciprocity MEP; To comprising the how point-to-multipoint MEG of multiple ME, the id information that this list comprises multiple reciprocity MEP.
5) ETH-CC sends the cycle.This parameter is relevant to application, and when for fault management, the transmission cycle of acquiescence is 1s; When for performance monitoring, the transmission cycle of acquiescence is 100ms; When switching, the transmission cycle of acquiescence is 3.33ms.
In prior art, support the MEP of ETH-CC by above-mentioned these information of manual configuration.Under VPLS environment, support each PE equipment of ETH-CC except the Ethernet OAM essential informations such as need configuration MEG rank, MEG ID, MEP ID, ETH-CC transmission cycle, also need to configure the MEP ID of all opposite end PE that add same VPLS example, form reciprocity MEP ID list.Not mating of any one configuration parameter will cause the generation of the connective defect condition of Ethernet.This has increased operation maintenance and management difficulty under VPLS environment.
Summary of the invention
In view of the existing problem of above-mentioned prior art, the present invention proposes method of automatic configuration and the system of Ethernet detection of connectivity under VPLS environment.Can effectively reduce the configuration management work of Ethernet OAM, improve network O&M efficiency.
According to an aspect of the present invention, the method for automatic configuration of Ethernet detection of connectivity under VPLS environment is proposed, wherein:
Realize intercommunication at the upper configuration of provider edge equipment (PE) Routing Protocol, and label allocation distribution protocol (LDP), label switched path (LSP) tunnel between PE, set up;
The conditional parameter of configuration virtual private local area network service (VPLS) on PE, comprise configuration VPLS example (VPLS ID), route-distinguisher (RD), route target (RT), place in circuit (AC) is bound with VPLS ID, and the automatic discovery of operation based on multi-protocols extending boundary gateway protocol (MP-BGP);
The Ethernet operation of configuration ethernet detection of connectivity (ETH-CC) on PE, administer and maintain (OAM) information, comprise that maintenance entity end points (MEP) rank, MEG ID, MEP ID and ETH-CC send the cycle, wherein, MEG rank is in the situation that Maintenance Entity (MEG) is nested, for distinguishing the regulatory boundary of each MEG, MEG ID represents the identifier of the MEG under MEP, the identifier of the MEP of MEP ID in MEG itself;
In the time that PE receives MP-BGP updating message, this MP-BGP updating message comprises Border Gateway Protocol (BGP) extended community attribute of carrying Ethernet OAM information, entrained Ethernet OAM information comprises that MEG rank, MEP ID and ETH-CC send the cycle, MP-BGP updating message also comprises that opposite end PE is for setting up the IP address of tag distribution protocol (T-LDP) session of based target, and opposite end PE adds RD, VPLS ID and the RT of VPLS example, PE finds to add other PE members of same VPLS example automatically according to these information of opposite end PE;
PE mates Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving with the Ethernet OAM information that self configures, if coupling, automatically generate reciprocity MEP ID list, send the MEP id information of the PE self that ETH-CC message carries for mating each opposite end PE of same VPLS example.
Further, if the entrained Ethernet OAM information of the BGP extended community attribute that PE receives do not mate with the Ethernet OAM information of self configuration, by generation local alarm or report webmaster.
Further, PE mates Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving with the Ethernet OAM information that self configures, comprise the following steps:
According to the MP-BGP updating message receiving, judge whether local PE and the opposite end PE that sends this message belong to same VPLS example member;
If belong to same VPLS example member, check the legitimacy of carrying the BGP extended community attribute form of Ethernet OAM information in MP-BGP updating message;
If legal, check whether MEG rank and the ETH-CC transmission period field parameter of in BGP extended community attribute, carrying match with local PE configuration parameter;
If coupling, MEG rank and ETH-CC transmission period field parameter match, and extract BGP extended community attribute MEP ID parameter, join the mapping relations list of the opposite end MEP ID of local PE generation and the IP address of opposite end PE;
If there is any one parameter not mate, produces corresponding local alarm or report webmaster.
Further, in the time that PE receives the ETH-CC message of each opposite end PE transmission that belongs to same VPLS example, whether the MEP id information of the opposite end PE self that inspection ETH-CC message is carried matches with the automatic opposite end MEP ID generating of local PE, and make respective handling according to matching result.Specifically comprise:
If the opposite end MEP ID that the MEP id information of the opposite end PE that ETH-CC message is carried self and local PE generate automatically matches, determine the connectedness between MEP according to the ETH-CC rule of having consulted;
Automatically all opposite end MEP ID that belong to same VPLS example that generate as MEP id information and the local PE of the opposite end PE self that ETH-CC message is carried match, and all there is connective that Ethernet connects between each MEP time, determine that described VPLS example can normally work; Otherwise described VPLS example exists the connective defect of Ethernet, PE is by corresponding generation local alarm or report webmaster.
Further, in BGP extended community attribute:
ETH-OAM represents BGP extended community attribute type, uses internet numbers distribution office (IANA) not reserve and unappropriated numeral, takies 2 bytes;
MEG rank is used minimum 3 effective bits of 1 byte, can distinguish 8 MEG ranks, rank under mark MEG;
The ETH-CC transmission cycle is used minimum 3 effective bits of 1 byte, can represent 8 kinds of cycles that send ETH-CC message;
MEP ID uses minimum 13 effective bits of 2 bytes, represents the MEP identifier of PE equipment configuration;
2 remaining bytes are reserved to be used as him.
According to a further aspect of the invention, also propose the automatic configuration system of Ethernet detection of connectivity under VPLS environment, this system comprises provider edge equipment (PE), and wherein, PE comprises:
The first dispensing unit, configuration Routing Protocol is realized intercommunication, and label allocation distribution protocol (LDP), sets up label switched path (LSP) tunnel between PE;
The second dispensing unit, the conditional parameter of configuration virtual private local area network service (VPLS), comprise configuration VPLS example (VPLS ID), route-distinguisher (RD), route target (RT), place in circuit (AC) is bound with VPLS ID, and the automatic discovery of operation based on multi-protocols extending boundary gateway protocol (MP-BGP);
The 3rd dispensing unit, the Ethernet operation of configuration ethernet detection of connectivity (ETH-CC), administer and maintain (OAM) information, comprise that maintenance entity end points (MEP) rank, MEG ID, MEP ID and ETH-CC send the cycle, wherein, MEG rank is in the situation that Maintenance Entity (MEG) is nested, for distinguishing the regulatory boundary of each MEG, MEG ID represents the identifier of the MEG under MEP, the identifier of the MEP of MEP ID in MEG itself;
Receiving element, while receiving MP-BGP updating message, this MP-BGP updating message comprises Border Gateway Protocol (BGP) extended community attribute of carrying Ethernet OAM information, entrained Ethernet OAM information comprises that MEG rank, MEP ID and ETH-CC send the cycle, MP-BGP updating message also comprises that opposite end PE is for setting up the IP address of tag distribution protocol (T-LDP) session of based target, and opposite end PE adds RD, VPLS ID and the RT of VPLS example, PE finds to add other PE members of same VPLS example automatically according to these information of opposite end PE;
Matching unit, Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving is mated with the Ethernet OAM information that self configures, if coupling, automatically generate reciprocity MEP ID list, send the MEP id information of the PE self that ETH-CC message carries for mating each opposite end PE of same VPLS example.
Further, if the entrained Ethernet OAM information of the BGP extended community attribute that matching unit receives do not mate with the Ethernet OAM information of self configuration, by generation local alarm or report webmaster.
Further, matching unit, according to the MP-BGP updating message receiving, judges whether local PE and the opposite end PE that sends this message belong to same VPLS example member;
If belong to same VPLS example member, check the legitimacy of carrying the BGP extended community attribute form of Ethernet OAM information in MP-BGP updating message;
If legal, check whether MEG rank and the ETH-CC transmission period field parameter of in BGP extended community attribute, carrying match with local PE configuration parameter;
If coupling, MEG rank and ETH-CC transmission period field parameter match, and extract BGP extended community attribute MEP ID parameter, join the mapping relations list of the opposite end MEPID of local PE generation and the IP address of opposite end PE;
If there is any one parameter not mate, produces corresponding local alarm or report webmaster.
Further, when matching unit receives the ETH-CC message of each opposite end PE transmission that belongs to same VPLS example, whether the MEP id information of the opposite end PE self that inspection ETH-CC message is carried matches with the automatic opposite end MEP ID generating of local PE, and make respective handling according to matching result.Specifically comprise:
If the opposite end MEP ID that the MEP id information of the opposite end PE that ETH-CC message is carried self and local PE generate automatically matches, determine the connectedness between MEP according to the ETH-CC rule of having consulted;
Automatically all opposite end MEP ID that belong to same VPLS example that generate as MEP id information and the local PE of the opposite end PE self that ETH-CC message is carried match, and all there is connective that Ethernet connects between each MEP time, determine that described VPLS example can normally work; Otherwise described VPLS example exists the connective defect of Ethernet, PE is by corresponding generation local alarm or report webmaster.
Further, in BGP extended community attribute:
ETH-OAM represents BGP extended community attribute type, uses internet numbers distribution office (IANA) not reserve and unappropriated numeral, takies 2 bytes;
MEG rank is used minimum 3 effective bits of 1 byte, can distinguish 8 MEG ranks, rank under mark MEG;
The ETH-CC transmission cycle is used minimum 3 effective bits of 1 byte, can represent 8 kinds of cycles that send ETH-CC message;
MEP ID uses minimum 13 effective bits of 2 bytes, represents the MEP identifier of PE equipment configuration;
2 remaining bytes are reserved to be used as him.
The variation of energy adaptive network topology of the present invention and the variation of user site, and do not need to revise the Ethernet OAM information configuration of PE, can effectively reduce the configuration management work of Ethernet OAM, for O&M and the management of network bring great convenience, improve network O&M efficiency.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is prior art VPLS basic framework schematic diagram.
Fig. 2 is the method for automatic configuration flow chart of Ethernet detection of connectivity under VPLS environment of the present invention.
Fig. 3 is the process schematic diagram that in the present invention, PE mates Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving with the Ethernet OAM information self configuring.
Fig. 4 is the automatic configuration system structural representation of Ethernet detection of connectivity under VPLS environment of the present invention.
Embodiment
Describe various exemplary embodiment of the present invention in detail now with reference to accompanying drawing.It should be noted that: unless illustrate in addition, the parts of setting forth in these embodiments and positioned opposite and the numerical value of step do not limit the scope of the invention.
, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not to draw according to actual proportionate relationship meanwhile.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in suitable situation, described technology, method and apparatus should be regarded as authorizing a part for specification.
In all examples with discussing shown here, it is exemplary that any occurrence should be construed as merely, rather than as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: in similar label and letter accompanying drawing below, represent similar terms, therefore, once be defined in an a certain Xiang Yi accompanying drawing, in accompanying drawing subsequently, do not need it to be further discussed.
Fig. 1 is prior art VPLS basic framework schematic diagram.
Carrier network forms Wide Area Network by routing device interconnection such as PE, operator's nucleus equipment (P), Router Reflectors (RR), forms the IP/MPLS basic network facility of operator.
PE is directly connected by ethernet link with customer edge devices (CE), and there is Ethernet bridge connection function, need to support multiple virtual switch instance (VSI), PE is responsible for exchanging to from the ethernet frame of a website CE another website CE being connected with other PE in same VPLS example.
P equipment is not directly connected with CE, is only responsible for the forwarding of MPLS message.
In the IP/MPLS of operator backbone network, the full connection that must set up Internal BGP (IBGP) peer-to-peer due to all PE realizes BGP(Border Gateway Protocol, Border Gateway Protocol) notice of route, for reducing the linking number of PE equipment I bgp peer, the autgmentability that improves network, can be used RR to solve.
Because tag distribution protocol (T-LDP) session that belongs to the PE equipment of same VPLS example and need to realize based target under VPLS environment connects entirely, for reducing the configuration management workload of setting up T-LDP session, the present invention adopts multi-protocols extending boundary gateway protocol (MP-BGP) extended mode to realize the automatic discovery to VPLS member, carry Ethernet OAM information by BGP extended community attribute, to realize the automatic configuration of Ethernet detection of connectivity.
Adopt MP-BGP only need configure PE and add certain VPLS example, notice to every other PE in the whole network by MP-BGP, automatically for the PE member who belongs to same VPLS example sets up T-LDP session connection.Therefore, reduce the configuration management workload of setting up T-LDP session.
Conventionally need to be on the each PE that belongs to same VPLS example the MEP ID of manual configuration opposite end PE, generate the MEP ID list of VPLS example.Adopt MP-BGP extended community attribute to carry Ethernet OAM information, be distributed to each PE that belongs to same VPLS example by MP-BGP, PE can generate MEP ID list automatically like this, and mates the Ethernet OAM parameter of each PE.Thereby realize the automatic configuration of Ethernet detection of connectivity.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the automatic layoutprocedure of the connective monitoring of Ethernet under VPLS environment of the present invention is further described.
Fig. 2 is the method for automatic configuration flow chart of Ethernet detection of connectivity under VPLS environment of the present invention.Concrete steps are as follows:
S201, on PE, configure Routing Protocol and realize intercommunication, and configure LDP agreement (Label Distribution Protocol, tag distribution protocol, the LDP that can adopt RFC 4762 to stipulate), between PE, set up LSP(Label Switching Path, label switched path) tunnel.
Configuration Routing Protocol and LDP, setting up MPLS lsp tunnel is all prior art, these are all parts for configuration VPLS example.
S202, on PE, configure the conditional parameter of VPLS, comprise the information such as configuration VPLS example (VPLS ID), route-distinguisher (RD), route target (RT), place in circuit (AC) is bound with VPLS ID, and the automatic discovery (can adopt BGP that RFC 4761 stipulate automatically find and signaling method) of operation based on MP-BGP.
Wherein, S201, S202 are prior aries, for configuring VPLS example.
S203, on PE the Ethernet OAM information of configuration ethernet detection of connectivity (ETH-CC), comprise that MEG rank, MEG ID, MEP ID and ETH-CC send the cycle.
These Ethernet OAM parameters of each maintenance entity end points (MEP) in same Maintenance Entity (MEG) must be mated and could be worked.
S204, in the time that PE receives MP-BGP updating message, this MP-BGP updating message comprises the BGP extended community attribute of carrying Ethernet OAM information, entrained Ethernet OAM information comprises that MEG rank, MEP ID and ETH-CC send the cycle.
MP-BGP updating message also comprises that opposite end PE is for setting up the IP address of T-LDP session, and opposite end PE adds RD, VPLS ID and the RT of VPLS example.PE finds to add other PE members of same VPLS example automatically according to these information of opposite end PE.
The 8 byte BGP extended community attributes that the present invention uses RFC 4360 to stipulate, when extended community attribute refers to BGP route, for carrying routing property, BGP route messages recipient is according to the routing property routing policy control of being correlated with.
BGP extended community attribute comprises the type field of 2 bytes and the codomain of 6 bytes.Form is as shown in the table.
ETH-OAM(2 byte type field)
MEG rank (1 byte)
ETH-CC sends the cycle (1 byte)
MEP ID(2 byte)
Reserved (2 byte)
The present invention does following regulation to the BGP extended community attribute of carrying Ethernet OAM information:
ETH-OAM: represent BGP extended community attribute type, use internet numbers distribution office (IANA) not reserve and unappropriated numeral, take 2 bytes;
MEG rank: use minimum 3 effective bits of 1 byte, can distinguish 8 MEG ranks, rank under mark MEG;
ETH-CC sends the cycle: use minimum 3 effective bits of 1 byte, can represent 8 kinds of cycles that send ETH-CC message;
MEP ID: use minimum 13 effective bits of 2 bytes, represent the MEP identifier of PE equipment configuration.
2 remaining bytes are reserved to be used as him.
MEG ID is the field of 48 bytes, on each PE, will configure, and in the present invention, BGP extended community attribute can not be held any more, therefore can not comprise.In ETH-CC message, can carry MEGID information, opposite end PE can check and mate.
S205, PE mate Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving with the Ethernet OAM information that self configures, if coupling, automatically generate reciprocity MEP ID list, send the MEP id information of the PE self that ETH-CC message carries for mating each opposite end PE of same VPLS example.If the entrained Ethernet OAM information of the BGP extended community attribute that PE receives do not mate with the Ethernet OAM information of self configuration, by generation local alarm or report webmaster.Below in conjunction with Fig. 3, the matching process in this step is elaborated.
The above-mentioned Ethernet detection of connectivity method of automatic configuration based on BGP expansion is compared with manual configuration, on PE, do not need to configure the MEP ID of all opposite end PE that add same VPLS example, in the time that PE adds VPLS example to change, do not need the configuration of the every other PE that revises this VPLS example yet.PE adds or the Ethernet OAM configuration of leaving certain VPLS example is all expanded automatically and completed by BGP.And the not match condition of the Ethernet OAM configuration information of any PE can be expanded automatically and be found by MP-BGP, for O&M and the management of network bring great convenience, has improved network O&M efficiency.
Fig. 3 is the process schematic diagram that in the present invention, PE mates Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving with the Ethernet OAM information self configuring, and comprises the following steps:
The MP-BGP updating message that S301, basis receive, judges whether local PE and the opposite end PE that sends this message belong to same VPLS example member.If belong to same VPLS example member, enter S302, otherwise, process ends.
Whether the PE member who judges whether to belong to same VPLS example is prior art, mainly unanimously come to determine according to RT parameter.
The legitimacy of carrying the BGP extended community attribute form of Ethernet OAM information in S302, inspection MP-BGP updating message, if legal, enters S303, otherwise, think illegal, ignore this BGP extended community attribute, process ends.
Whether the MEG rank of carrying in S303, inspection BGP extended community attribute and ETH-CC send period field parameter and match with local PE configuration parameter, if coupling, MEG rank and ETH-CC transmission period field parameter match, and enter S304, otherwise, enter S305.
S304, extraction BGP extended community attribute MEP ID parameter, join the mapping relations list of the opposite end MEP ID of local PE generation and the IP address of opposite end PE.
Comprise the inaccessible MP-BGP updating message of network layer during if receive, delete the mapping relations list of the IP address of opposite end MEP ID and opposite end PE.
Mapping relations list comprises the list of the IP address of MEP ID in the same MEG that belongs to same VPLS example and PE.As the IP address of MEP 1 corresponding PE1; The IP address of MEP 2 corresponding PE2 ...
If S305 has any one parameter not mate, produce corresponding local alarm or report webmaster.As: MEG rank is inconsistent, and the MEG rank that produces opposite end PE is not mated to alarm; It is inconsistent that ETH-CC sends the cycle, and the ETH-CC transmission cycle that produces opposite end PE is not mated to alarm.
In one embodiment of the invention, after S205 or S305,, PE mates Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving with the Ethernet OAM information self configuring after, further comprising the steps of:
In the time that PE receives the ETH-CC message of each opposite end PE transmission that belongs to same VPLS example, whether the MEP id information of the opposite end PE self that inspection ETH-CC message is carried matches with the automatic opposite end MEP ID generating of local PE, and make respective handling according to matching result.Specifically comprise:
1), if the opposite end MEP ID that the MEP id information of the opposite end PE that ETH-CC message is carried self and local PE generate automatically matches, determine the connectedness between MEP according to the ETH-CC rule of having consulted;
2) all opposite end MEP ID that belong to same VPLS example that automatically generate as MEP id information and the local PE of the opposite end PE self that ETH-CC message is carried match, and all there is connective that Ethernet connects between each MEP time, can determine that described VPLS example can normally work; Otherwise described VPLS example exists the connective defect of Ethernet, PE is by corresponding generation local alarm or report webmaster.
Fig. 4 is the automatic configuration system structural representation of Ethernet detection of connectivity under VPLS environment of the present invention.This system comprises the routing devices such as provider edge equipment (PE), operator's nucleus equipment (P), Router Reflector (RR), wherein, PE comprises the first dispensing unit 41, the second dispensing unit 42, the 3rd dispensing unit 43, receiving element 44 and matching unit 45.
The first dispensing unit 41, configuration Routing Protocol is realized intercommunication, and configures LDP agreement (Label Distribution Protocol, tag distribution protocol, the LDP that can adopt RFC 4762 to stipulate), sets up lsp tunnel between PE.
The second dispensing unit 42, the conditional parameter of configuration VPLS, the information such as configuration VPLS example (VPLS ID), route-distinguisher (RD), route target (RT), place in circuit (AC) is bound with VPLS ID, and the automatic discovery (the BGP signaling method that can adopt RFC 4761 stipulate) of operation based on MP-BGP.
The 3rd dispensing unit 43, the Ethernet OAM information of configuration ethernet detection of connectivity (ETH-CC), comprises that MEG rank, MEG ID, MEP ID and ETH-CC send the cycle.Wherein, MEG rank is in the situation that Maintenance Entity (MEG) is nested, and for distinguishing the regulatory boundary of each MEG, MEG ID represents the identifier of the MEG under MEP, the identifier of the MEP of MEP ID in MEG itself.
The second dispensing unit 42 can configure laggard row configuration at the first dispensing unit 41, and the 3rd dispensing unit 43 can configure laggard row configuration at the second dispensing unit 42.Certainly, above-mentioned three dispensing units also can be carried out configuration operation separately, rather than must wait for after other dispensing units complete and being configured.
Receiving element 44, receives MP-BGP updating message, and this MP-BGP updating message comprises the BGP extended community attribute of carrying Ethernet OAM information, and entrained Ethernet OAM information comprises that MEG rank, MEP ID and ETH-CC send the cycle.
MP-BGP updating message also comprises that opposite end PE is for setting up the IP address of tag distribution protocol (T-LDP) session of based target, and opposite end PE adds RD, VPLS ID and the RT of VPLS example, PE finds to add other PE members of same VPLS example automatically according to these information of opposite end PE.
The 8 byte BGP extended community attributes that the present invention uses RFC 4360 to stipulate, when extended community attribute refers to BGP route, for carrying routing property, BGP route messages recipient is according to the routing property route control strategy of being correlated with.
BGP extended community attribute comprises the type field of 2 bytes and the codomain of 6 bytes.Form is as shown in the table.
ETH-OAM(2 byte type field)
MEG rank (1 byte)
ETH-CC sends the cycle (1 byte)
MEP ID(2 byte)
Reserved (2 byte)
The present invention does following regulation to the BGP extended community attribute of carrying Ethernet OAM information:
ETH-OAM: represent BGP extended community attribute type, use internet numbers distribution office (IANA) not reserve and unappropriated numeral, take 2 bytes;
MEG rank: use minimum 3 effective bits of 1 byte, can distinguish 8 MEG ranks, rank under mark MEG;
ETH-CC sends the cycle: use minimum 3 effective bits of 1 byte, can represent 8 kinds of cycles that send ETH-CC message;
MEP ID: use minimum 13 effective bits of 2 bytes, represent the MEP identifier of PE equipment configuration.
2 remaining bytes are reserved to be used as him.
Matching unit 45, Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving is mated with the Ethernet OAM information that self configures, if coupling, automatically generate reciprocity MEP ID list, send the MEP id information of the PE self that ETH-CC message carries for mating each opposite end PE of same VPLS example.
If the entrained Ethernet OAM information of the BGP extended community attribute receiving do not mate with the Ethernet OAM information of self configuration, by generation local alarm or report webmaster.
The above-mentioned Ethernet detection of connectivity method of automatic configuration based on BGP expansion is compared with manual configuration, on PE, do not need to configure the MEP ID of all opposite end PE that add same VPLS example, in the time that PE adds VPLS example to change, do not need the configuration of the every other PE that revises this VPLS example yet.PE adds or the Ethernet OAM configuration of leaving certain VPLS example is all expanded automatically and completed by BGP.And the not match condition of the Ethernet OAM configuration information of any PE can be expanded automatically and be found by MP-BGP, for O&M and the management of network bring great convenience, has improved network O&M efficiency.
To describe matching unit 45 mates the Ethernet OAM information in MP-BGP updating message process with the Ethernet OAM information self configuring below in detail.
Matching unit 45, according to the MP-BGP updating message receiving, judges whether local PE and the opposite end PE that sends this message belong to same VPLS example member.If do not belong to same VPLS example member, no longer carry out.
If belong to same VPLS example member, check the legitimacy of carrying the BGP extended community attribute form of Ethernet OAM information in MP-BGP updating message, if illegal, ignore this BGP extended community attribute.
If legal, check whether MEG rank and the ETH-CC transmission period field parameter of in BGP extended community attribute, carrying match with local PE configuration parameter.
If coupling, MEG rank and ETH-CC transmission period field parameter match, and extract BGP extended community attribute MEP ID parameter, join the opposite end MEPID of local PE generation and the mapping relations list of PE.Comprise the inaccessible MP-BGP updating message of network layer during if receive, the mapping relations list item of opposite end MEP ID and PE in delete list.
If there is any one parameter not mate, produces corresponding local alarm or report webmaster.As: MEG rank is inconsistent, and the MEG rank that produces opposite end PE is not mated to alarm; It is inconsistent that ETH-CC sends the cycle, and the ETH-CC transmission cycle that produces opposite end PE is not mated to alarm.
In one embodiment of the invention, when matching unit receives the ETH-CC message of each opposite end PE transmission that belongs to same VPLS example, whether the MEP id information of the opposite end PE self that inspection ETH-CC message is carried matches with the automatic opposite end MEP ID generating of local PE, and make respective handling according to matching result.Specifically comprise:
If the opposite end MEP ID that the MEP id information of the opposite end PE that ETH-CC message is carried self and local PE generate automatically matches, determine the connectedness between MEP according to the ETH-CC rule of having consulted;
Automatically all opposite end MEP ID that belong to same VPLS example that generate as MEP id information and the local PE of the opposite end PE self that ETH-CC message is carried match, and all there is connective that Ethernet connects between each MEP time, determine that described VPLS example can normally work; Otherwise described VPLS example exists the connective defect of Ethernet, PE is by corresponding generation local alarm or report webmaster.
So far, described the present invention in detail.For fear of covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
May realize in many ways method of the present invention and device.For example, can realize method of the present invention and device by any combination of software, hardware, firmware or software, hardware, firmware.The said sequence that is used for the step of described method is only in order to describe, and the step of method of the present invention is not limited to above specifically described order, unless otherwise specified.In addition, in certain embodiments, can be also the program being recorded in recording medium by the invention process, these programs comprise the machine readable instructions for realizing the method according to this invention.Thereby the present invention also covers the recording medium of storing the program for carrying out the method according to this invention.
Although specific embodiments more of the present invention are had been described in detail by example, it should be appreciated by those skilled in the art, above example is only in order to describe, rather than in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.

Claims (10)

  1. The method of automatic configuration of Ethernet detection of connectivity under 1.VPLS environment, is characterized in that:
    Realize intercommunication at the upper configuration of provider edge equipment (PE) Routing Protocol, and label allocation distribution protocol (LDP), label switched path (LSP) tunnel between PE, set up;
    The conditional parameter of configuration virtual private local area network service (VPLS) on PE, comprise configuration VPLS example (VPLS ID), route-distinguisher (RD), route target (RT), place in circuit (AC) is bound with VPLS ID, and the automatic discovery of operation based on multi-protocols extending boundary gateway protocol (MP-BGP);
    The Ethernet operation of configuration ethernet detection of connectivity (ETH-CC) on PE, administer and maintain (OAM) information, comprise that maintenance entity end points (MEP) rank, MEG ID, MEP ID and ETH-CC send the cycle, wherein, MEG rank is in the situation that Maintenance Entity (MEG) is nested, for distinguishing the regulatory boundary of each MEG, MEG ID represents the identifier of the MEG under MEP, the identifier of the MEP of MEP ID in MEG itself;
    In the time that PE receives MP-BGP updating message, this MP-BGP updating message comprises Border Gateway Protocol (BGP) extended community attribute of carrying Ethernet OAM information, entrained Ethernet OAM information comprises that MEG rank, MEP ID and ETH-CC send the cycle, MP-BGP updating message also comprises that opposite end PE is for setting up the IP address of tag distribution protocol (T-LDP) session of based target, and opposite end PE adds RD, VPLS ID and the RT of VPLS example, PE finds to add other PE members of same VPLS example automatically according to these information of opposite end PE;
    PE mates Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving with the Ethernet OAM information that self configures, if coupling, automatically generate reciprocity MEP ID list, send the MEP id information of the PE self that ETH-CC message carries for mating each opposite end PE of same VPLS example.
  2. 2. the method for automatic configuration of Ethernet detection of connectivity under VPLS environment according to claim 1, is characterized in that:
    If the entrained Ethernet OAM information of the BGP extended community attribute that PE receives do not mate with the Ethernet OAM information of self configuration, by generation local alarm or report webmaster.
  3. 3. according to the method for automatic configuration of Ethernet detection of connectivity under VPLS environment described in claim 1 or 2, it is characterized in that:
    PE mates Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving with the Ethernet OAM information that self configures, comprise the following steps:
    According to the MP-BGP updating message receiving, judge whether local PE and the opposite end PE that sends this message belong to same VPLS example member;
    If belong to same VPLS example member, check the legitimacy of carrying the BGP extended community attribute form of Ethernet OAM information in MP-BGP updating message;
    If legal, check whether MEG rank and the ETH-CC transmission period field parameter of in BGP extended community attribute, carrying match with local PE configuration parameter;
    If coupling, MEG rank and ETH-CC transmission period field parameter match, and extract BGP extended community attribute MEP ID parameter, join the mapping relations list of the opposite end MEPID of local PE generation and the IP address of opposite end PE;
    If there is any one parameter not mate, produces corresponding local alarm or report webmaster.
  4. 4. according to the method for automatic configuration of Ethernet detection of connectivity under VPLS environment described in claim 1 or 2, it is characterized in that:
    In the time that PE receives the ETH-CC message of each opposite end PE transmission that belongs to same VPLS example, whether the MEP id information of the opposite end PE self that inspection ETH-CC message is carried matches with the automatic opposite end MEP ID generating of local PE, and make respective handling according to matching result.Specifically comprise:
    If the opposite end MEP ID that the MEP id information of the opposite end PE that ETH-CC message is carried self and local PE generate automatically matches, determine the connectedness between MEP according to the ETH-CC rule of having consulted;
    Automatically all opposite end MEP ID that belong to same VPLS example that generate as MEP id information and the local PE of the opposite end PE self that ETH-CC message is carried match, and all there is connective that Ethernet connects between each MEP time, determine that described VPLS example can normally work; Otherwise described VPLS example exists the connective defect of Ethernet, PE is by corresponding generation local alarm or report webmaster.
  5. 5. according to the method for automatic configuration of Ethernet detection of connectivity under VPLS environment described in claim 1 or 2, it is characterized in that:
    In BGP extended community attribute:
    ETH-OAM represents BGP extended community attribute type, uses internet numbers distribution office (IANA) not reserve and unappropriated numeral, takies 2 bytes;
    MEG rank is used minimum 3 effective bits of 1 byte, can distinguish 8 MEG ranks, rank under mark MEG;
    The ETH-CC transmission cycle is used minimum 3 effective bits of 1 byte, can represent 8 kinds of cycles that send ETH-CC message;
    MEP ID uses minimum 13 effective bits of 2 bytes, represents the MEP identifier of PE equipment configuration;
    2 remaining bytes are reserved to be used as him.
  6. The automatic configuration system of Ethernet detection of connectivity under 6.VPLS environment, this system comprises provider edge equipment (PE), it is characterized in that, PE comprises:
    The first dispensing unit, configuration Routing Protocol is realized intercommunication, and label allocation distribution protocol (LDP), sets up label switched path (LSP) tunnel between PE;
    The second dispensing unit, the conditional parameter of configuration virtual private local area network service (VPLS), comprise configuration VPLS example (VPLS ID), route-distinguisher (RD), route target (RT), place in circuit (AC) is bound with VPLS ID, and the automatic discovery of operation based on multi-protocols extending boundary gateway protocol (MP-BGP);
    The 3rd dispensing unit, the Ethernet operation of configuration ethernet detection of connectivity (ETH-CC), administer and maintain (OAM) information, comprise that maintenance entity end points (MEP) rank, MEG ID, MEP ID and ETH-CC send the cycle, wherein, MEG rank is in the situation that Maintenance Entity (MEG) is nested, for distinguishing the regulatory boundary of each MEG, MEG ID represents the identifier of the MEG under MEP, the identifier of the MEP of MEP ID in MEG itself;
    Receiving element, while receiving MP-BGP updating message, this MP-BGP updating message comprises Border Gateway Protocol (BGP) extended community attribute of carrying Ethernet OAM information, entrained Ethernet OAM information comprises that MEG rank, MEP ID and ETH-CC send the cycle, MP-BGP updating message also comprises that opposite end PE is for setting up the IP address of tag distribution protocol (T-LDP) session of based target, and opposite end PE adds RD, VPLS ID and the RT of VPLS example, PE finds to add other PE members of same VPLS example automatically according to these information of opposite end PE;
    Matching unit, Ethernet OAM information entrained BGP extended community attribute in the MP-BGP updating message receiving is mated with the Ethernet OAM information that self configures, if coupling, automatically generate reciprocity MEP ID list, send the MEP id information of the PE self that ETH-CC message carries for mating each opposite end PE of same VPLS example.
  7. 7. the automatic configuration system of Ethernet detection of connectivity under VPLS environment according to claim 6, is characterized in that:
    If the entrained Ethernet OAM information of the BGP extended community attribute that matching unit receives do not mate with the Ethernet OAM information of self configuration, by generation local alarm or report webmaster.
  8. 8. according to the automatic configuration system of Ethernet detection of connectivity under VPLS environment described in claim 6 or 7, it is characterized in that:
    Matching unit, according to the MP-BGP updating message receiving, judges whether local PE and the opposite end PE that sends this message belong to same VPLS example member;
    If belong to same VPLS example member, check the legitimacy of carrying the BGP extended community attribute form of Ethernet OAM information in MP-BGP updating message;
    If legal, check whether MEG rank and the ETH-CC transmission period field parameter of in BGP extended community attribute, carrying match with local PE configuration parameter;
    If coupling, MEG rank and ETH-CC transmission period field parameter match, and extract BGP extended community attribute MEP ID parameter, join the mapping relations list of the opposite end MEPID of local PE generation and the IP address of opposite end PE;
    If there is any one parameter not mate, produces corresponding local alarm or report webmaster.
  9. 9. according to the automatic configuration system of Ethernet detection of connectivity under VPLS environment described in claim 6 or 7, it is characterized in that:
    When matching unit receives the ETH-CC message of each opposite end PE transmission that belongs to same VPLS example, whether the MEP id information of the opposite end PE self that inspection ETH-CC message is carried matches with the automatic opposite end MEP ID generating of local PE, and make respective handling according to matching result.Specifically comprise:
    If the opposite end MEP ID that the MEP id information of the opposite end PE that ETH-CC message is carried self and local PE generate automatically matches, determine the connectedness between MEP according to the ETH-CC rule of having consulted;
    Automatically all opposite end MEP ID that belong to same VPLS example that generate as MEP id information and the local PE of the opposite end PE self that ETH-CC message is carried match, and all there is connective that Ethernet connects between each MEP time, determine that described VPLS example can normally work; Otherwise described VPLS example exists the connective defect of Ethernet, PE is by corresponding generation local alarm or report webmaster.
  10. 10. according to the automatic configuration system of Ethernet detection of connectivity under VPLS environment described in claim 6 or 7, it is characterized in that:
    In BGP extended community attribute:
    ETH-OAM represents BGP extended community attribute type, uses internet numbers distribution office (IANA) not reserve and unappropriated numeral, takies 2 bytes;
    MEG rank is used minimum 3 effective bits of 1 byte, can distinguish 8 MEG ranks, rank under mark MEG;
    The ETH-CC transmission cycle is used minimum 3 effective bits of 1 byte, can represent 8 kinds of cycles that send ETH-CC message;
    MEP ID uses minimum 13 effective bits of 2 bytes, represents the MEP identifier of PE equipment configuration;
    2 remaining bytes are reserved to be used as him.
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